Coil-support



B. A. BBHREND.

GOIL SUPPORT.

APPLIOATION HLBD 0611.19, 1908.

Dec. 22,

Fata' :III

lllllllllllllllllllllIl]llllllllllllllllllllllllllllllllllllllllllllllllllllllllllUNITED STATES PATENT OFFICE.

EERNARD A. BEHREND, OF MILWAUKEE. WISCONSIN, ASSIGNOR, BY MESNE ASSIGN-MENTS, TO ALLIS-CHALMERS MANUFACTURING COMPANY, CORPGRATION OF DELAWARE.

CQIL-SUPPORT.

Specification of Letters Patent.

Patented Dec. 22, 1914.

a citizen of the United States, residing at Milwaukee, in the county ofMilwaukee and f State. of lVisconsin, have inrented certain new anduseful Improvements in Geil-Supports, of which the following is a full,clear, and exact specification.

My inrcntion relates to dynamo-electric machines, and particularly tomeans for supporting the end turns or end conductors of the windingsthereof.

If the endturns or end conductors of the coils of dynamo-electricmachines, that is, those parts which normally eXtend beyond the slots inthe core, are not supported in some manner, they are liable to bedistored by the stresses due to the interaction between adjacentmagnetic fields and the magnetic fields due to the currents in them.This danger of distortion has heretofore been recognized, and severalschemes have been proposed to prevent it.

It is the object of my present inyention'to provide an improvement onsuch prior schemes,-and to prevent all liability of distortion of theend turns or end conductors in a manner at once simple, inexpensive, andefi'icient. With this end in view, I provide rings, preferably formed oflaminations of some non-magnetic material, which are slotted in a mannersimilar to the slotting in the core, and fasten the loops of the endturns or end conductors in the slots of these rings. The riugs may besupported in any desired manner. VVhile my invention is particularlyapplicable for supporting the end turns of stator coils, it is also ofadvantage for supporting the end turns of rotor coils.

The various novel features of my invention Will appear from thedescription and drawings, and will be particularly pointed out in theclaims.

Figure 1 is a partial longitudinal section' of a dynamo-electric machinein which the end turns of the stator coils are supported in accordancewith my invention; Fig. 2 is a' the two-layer winding, to which style of\vmding my 'invention is particularly apphcable, are held in the usualslots of such core by wedges 13. The lower conductor in one slot isconnected to the upper conductor in another slot 'of the stator by theusual end turns, which consists of the oblique portions 14 and theportions 15 parallel to the conductors in the slot. The portions 15 arelocated in open slots 16 in rings 17, and are held there by wedges 18.The rings 17 are preferably formed of lamin of some nonconductingmaterial, such as fiber, vulcabeston, or fish paper, though brass orother` non-magnetic material could be used. The laminae of the rings 17are preferably formed in sections and built up with the joints broken,as indicated in Fig. 3. These sections may be punched out in the samemanner as are the laminations of the core 1.1, and may be made with thesame dies or with different dies. according as the end turns are bentaway from the rotor or not. In the case shown they would be made withdifferent dies. The rings 17 are supported by brackets 19 fastened inany desired manner to the stator frame. End housing's 20 may be providedto inclose and protect the rings 17 and the end turns. lVith thisconstruction shown, the end turns are firmly supported in an exceedinglysimple and inexpensive manner. and the parts are easy to manufacture andassemble.

Many changes in the exact arrangement here shown will be obvious tothose skilled in the art, and all such which do not involve a departurefrom the spirit and scope of my invention I aim tocover in the followingclaims.

What I claim as new is:

1. In a dynamo-electric machine. the combination of a slotted core` awinding comprising conductors located in slots in said core and endconductors located outside of said slots, an open-slotted laminatedvring of non-magnetic material in the slots of which portions of saidend conductors are disposed, the slots in said ring opening radiallyinward. and wedges held in place in the slots of said ring by en agementwith the sides of the slots and orming means for securing said endconductors in place in said slots.

2. In a dynamo-electric machine, a rotor and stator, the core of saidstator being slotted, a winding comprising conductors having portionslocated in said 'slots and end portions located outside of said core,-openslotted rings mounted on said stator, the slots of said ringsopening radially inward, the end portions of said conductors located insaid slots and Wedges in said slots formparts of said conductors Whichare outside of the core, the slots opening radially inward, and Wedgesforming the sole means for holding in place the parts of the conductorWhich are located in the slots in said ring.

Milwaukee, Wisconsin, October 14, 1908. In testimony Whereof I aflix mysignature, in the presence of two Witnessjes.

BERNfARD A. BEHREND.

Witnesses:

CHAs. E. LORD, H.'C. CAsE.

